PICO® 259-UL913 Series - Intrinsically Safe Fuse for Hazardous Locations

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Disclaimer Notice

Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse. "Littelfuse" includes Littelfuse, Inc., and all of its affiliate entities.

The Littelfuse PICO® 259-UL913 Series Intrinsically Safe Fuse is the first Fuse certified under the latest revision of the UL 913 Standard. This range of encapsulated, hermetically sealed fuses are ideal for 125V applications in the oil, gas, mining, chemical, pharmaceutical, and food/beverage processing industries. The PICO® 259-UL913 Series Fuse and its encapsulant prevent heat and sparks from being exposed to explosive gases or dust in the environment. The Fuse is suitable for use in intrinsically safe apparatus for voltages not exceeding 125Vrms (190V peak).


  • Hermetically sealed, encapsulated design
  • Well suited for 125V applications
  • Current rating options from 62mA to 5A 
  • Designed for operation in a range of hazardous environments
  • RoHS compliant

  • Testing, measuring or processing electronic and electrical equipment
  • Motor controllers
  • Lighting
  • Communication handsets
  • Flow meters
  • Process control and automation
  • Sensors


  • The fuse encapsulation prevents heat and sparks from being exposed to the hazardous gases or dust in the environment
  • Eliminates the need for an additional potting, epoxy, or encapsulation process for the fuse, thereby reducing total product cost
  • Increases overall safety of the apparatus, which enhances protection of human life in hazardous operating environments

Access specifications, certifications, check availability and order parts below

Catalog #Amps (A)VDC (V)VAC (V)Nominal Melting I2T (A2sec)Resistance
Interrupting RatingOpeningNom
SizeMin Operating Temp (°C)Max Operating Temp (°C)StockSamplesCompare
H259.0620.0621251250.000077300A 125V DCFast-Acting (F)2.113 x 13mm-5590CheckOrder
H259.1250.1251251250.00121.7300A 125V DCFast-Acting (F)1.313 x 13mm-5590CheckOrder
H259.2500.251251250.00950.665300A 125V DCFast-Acting (F)0.8313 x 13mm-5590CheckOrder
H259.3750.3751251250.0250.395300A 125V DCFast-Acting (F)0.8113 x 13mm-5590CheckOrder
H259.5000.51251250.05980.302300A 125V DCFast-Acting (F)0.7813 x 13mm-5590CheckOrder
H259.7500.751251250.1530.175300A 125V DCFast-Acting (F)0.2313 x 13mm-5590CheckOrder
H259001.11251250.2560.128300A 125V DCFast-Acting (F)0.2413 x 13mm-5590CheckOrder
H259003.31251251.270.0295300A 125V DCFast-Acting (F)0.13113 x 13mm-5590CheckOrder
H259005.5631254.140.0158300A 63V DCFast-Acting (F)0.1113 x 13mm-5590CheckOrder

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